LineNode.GetNodesFromTextRange - метод (Int32%, Int32%)

Статья
11/04/2008

Обновлен: Ноябрь 2007

Returns a collection of descendant ContextNode objects that are relevant to the specified text range in the recognized string.

Пространство имен: Microsoft.Ink
Сборка: Microsoft.Ink.Analysis (в Microsoft.Ink.Analysis.dll)

Синтаксис

'Декларация
Public Function GetNodesFromTextRange ( _
    ByRef start As Integer, _
    ByRef length As Integer _
) As ContextNodeCollection
'Применение
Dim instance As LineNode
Dim start As Integer
Dim length As Integer
Dim returnValue As ContextNodeCollection

returnValue = instance.GetNodesFromTextRange(start, _
    length)

public ContextNodeCollection GetNodesFromTextRange(
    ref int start,
    ref int length
)

public:
ContextNodeCollection^ GetNodesFromTextRange(
    int% start, 
    int% length
)

public ContextNodeCollection GetNodesFromTextRange(
    /** @ref */int start,
    /** @ref */int length
)

public function GetNodesFromTextRange(
    start : int, 
    length : int
) : ContextNodeCollection

Параметры

start
Тип: System.Int32%
The start of the text range in the recognized string.

length
Тип: System.Int32%
The length of the text range in the recognized string.

Возвращаемое значение

Тип: Microsoft.Ink.ContextNodeCollection
The collection of descendant ContextNode objects that are relevant to the specified text range in the recognized string.

Заметки

The specified text range should be relative to the recognized string of this LineNode and not the recognized string of the entire RootNode.

The start and length parameters are references because their values can be changed. For example, if the return value of GetRecognizedString is "I am late" and you pass in values of start = 6 and length = 1, corresponding to the letter "a," then the ContextNodeCollection is likely to have just one ContextNode, which is the InkWordNode that corresponds to the word "late." In this case, the value of start will be changed to 5 and the value of length will be changed to 4, corresponding to the entire word "late."

Примеры

The following example takes a TextBox, selectedResultsTextBox, whose TextBox.Text property has been set previously to the value returned by GetRecognizedString for a LineNode, line. The user has selected some text in the TextBox. The example code takes the selection and marks the Strokes that corresponds to that selection.

' Find out what's been selected in the text box
Dim start As Integer = selectedResultsTextBox.SelectionStart
Dim length As Integer = selectedResultsTextBox.SelectionLength

' Return if no text is selected.
If start = 0 Then
    Return
End If

' Get the nodes that correspond to that range
Dim selectedNodes As ContextNodeCollection
selectedNodes = line.GetNodesFromTextRange(start, length)

' Use the new start and length value to update the
' selection in the TextBox
selectedResultsTextBox.SelectionStart = start
selectedResultsTextBox.SelectionLength = length

' Color the strokes red if part of the selected words.
' Otherwise, color them black.
For Each node As ContextNode In line.SubNodes
    Dim inkStroke As Stroke
    For Each inkStroke In node.Strokes
        If selectedNodes.Contains(node) Then
            inkStroke.DrawingAttributes = New DrawingAttributes(Color.Red)
        Else
            inkStroke.DrawingAttributes = New DrawingAttributes(Color.Black)
        End If
    Next inkStroke
Next node

                    // Find out what's been selected in the text box
                    int start = selectedResultsTextBox.SelectionStart;
                    int length = selectedResultsTextBox.SelectionLength;

                    // Return if no text is selected.
                    if (length == 0)
                        return;

                    // Get the nodes that correspond to that range
                    ContextNodeCollection selectedNodes =
                        line.GetNodesFromTextRange(ref start, ref length);

                    // Use the new start and length value to update the
                    // selection in the TextBox
                    selectedResultsTextBox.SelectionStart = start;
                    selectedResultsTextBox.SelectionLength = length;

                    // Color the strokes red if part of the selected words.
                    // Otherwise, color them black.
                    foreach (ContextNode node in line.SubNodes)
                    {
                        foreach (Stroke stroke in node.Strokes)
                        {
                            if (selectedNodes.Contains(node))
                            {
                                stroke.DrawingAttributes =
                                    new DrawingAttributes(Color.Red);
                            }
                            else
                            {
                                stroke.DrawingAttributes =
                                    new DrawingAttributes(Color.Black);
                            }
                        }
                    }

Платформы

Windows Vista

Среды .NET Framework и .NET Compact Framework поддерживают не все версии каждой платформы. Поддерживаемые версии перечислены в разделе Требования к системе для .NET Framework.